X-Git-Url: http://git.sourceforge.jp/view?a=blobdiff_plain;f=gcc%2Ftree-optimize.c;h=7a9d2bd7c46902ee6101e50789dad3d7fbeca601;hb=56c337f991314454c71d0b6738c88eeb80d3aad1;hp=48842290a46a68cba3a39ec89edd5155f5e48be5;hpb=a6c787e5b7ad773092038330079c7c62122ae7f7;p=pf3gnuchains%2Fgcc-fork.git diff --git a/gcc/tree-optimize.c b/gcc/tree-optimize.c index 48842290a46..7a9d2bd7c46 100644 --- a/gcc/tree-optimize.c +++ b/gcc/tree-optimize.c @@ -1,12 +1,13 @@ /* Top-level control of tree optimizations. - Copyright 2001, 2002, 2003, 2004, 2005 Free Software Foundation, Inc. + Copyright 2001, 2002, 2003, 2004, 2005, 2007, 2008, 2009 + Free Software Foundation, Inc. Contributed by Diego Novillo This file is part of GCC. GCC is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by -the Free Software Foundation; either version 2, or (at your option) +the Free Software Foundation; either version 3, or (at your option) any later version. GCC is distributed in the hope that it will be useful, @@ -15,9 +16,8 @@ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License -along with GCC; see the file COPYING. If not, write to -the Free Software Foundation, 59 Temple Place - Suite 330, -Boston, MA 02111-1307, USA. */ +along with GCC; see the file COPYING3. If not see +. */ #include "config.h" #include "system.h" @@ -48,568 +48,310 @@ Boston, MA 02111-1307, USA. */ #include "cgraph.h" #include "graph.h" #include "cfgloop.h" +#include "except.h" -/* Global variables used to communicate with passes. */ -int dump_flags; -bool in_gimple_form; +/* Gate: execute, or not, all of the non-trivial optimizations. */ + +static bool +gate_all_optimizations (void) +{ + return (optimize >= 1 + /* Don't bother doing anything if the program has errors. + We have to pass down the queue if we already went into SSA */ + && (!(errorcount || sorrycount) || gimple_in_ssa_p (cfun))); +} -/* The root of the compilation pass tree, once constructed. */ -static struct tree_opt_pass *all_passes; +struct gimple_opt_pass pass_all_optimizations = +{ + { + GIMPLE_PASS, + "*all_optimizations", /* name */ + gate_all_optimizations, /* gate */ + NULL, /* execute */ + NULL, /* sub */ + NULL, /* next */ + 0, /* static_pass_number */ + TV_NONE, /* tv_id */ + 0, /* properties_required */ + 0, /* properties_provided */ + 0, /* properties_destroyed */ + 0, /* todo_flags_start */ + 0 /* todo_flags_finish */ + } +}; -/* Pass: dump the gimplified, inlined, functions. */ +/* Gate: execute, or not, all of the non-trivial optimizations. */ -static struct tree_opt_pass pass_gimple = +static bool +gate_all_early_local_passes (void) { - "gimple", /* name */ - NULL, /* gate */ + /* Don't bother doing anything if the program has errors. */ + return (!errorcount && !sorrycount); +} + +struct simple_ipa_opt_pass pass_early_local_passes = +{ + { + SIMPLE_IPA_PASS, + "early_local_cleanups", /* name */ + gate_all_early_local_passes, /* gate */ NULL, /* execute */ NULL, /* sub */ NULL, /* next */ 0, /* static_pass_number */ - 0, /* tv_id */ + TV_NONE, /* tv_id */ 0, /* properties_required */ - PROP_gimple_any, /* properties_provided */ + 0, /* properties_provided */ 0, /* properties_destroyed */ 0, /* todo_flags_start */ - TODO_dump_func, /* todo_flags_finish */ - 0 /* letter */ + TODO_remove_functions /* todo_flags_finish */ + } }; +static unsigned int +execute_early_local_optimizations (void) +{ + /* First time we start with early optimization we need to advance + cgraph state so newly inserted functions are also early optimized. + However we execute early local optimizations for lately inserted + functions, in that case don't reset cgraph state back to IPA_SSA. */ + if (cgraph_state < CGRAPH_STATE_IPA_SSA) + cgraph_state = CGRAPH_STATE_IPA_SSA; + return 0; +} + /* Gate: execute, or not, all of the non-trivial optimizations. */ static bool -gate_all_optimizations (void) +gate_all_early_optimizations (void) { return (optimize >= 1 /* Don't bother doing anything if the program has errors. */ && !(errorcount || sorrycount)); } -static struct tree_opt_pass pass_all_optimizations = +struct gimple_opt_pass pass_all_early_optimizations = { - NULL, /* name */ - gate_all_optimizations, /* gate */ - NULL, /* execute */ + { + GIMPLE_PASS, + "early_optimizations", /* name */ + gate_all_early_optimizations, /* gate */ + execute_early_local_optimizations, /* execute */ NULL, /* sub */ NULL, /* next */ 0, /* static_pass_number */ - 0, /* tv_id */ + TV_NONE, /* tv_id */ 0, /* properties_required */ 0, /* properties_provided */ 0, /* properties_destroyed */ 0, /* todo_flags_start */ - 0, /* todo_flags_finish */ - 0 /* letter */ + 0 /* todo_flags_finish */ + } +}; + +/* Pass: cleanup the CFG just before expanding trees to RTL. + This is just a round of label cleanups and case node grouping + because after the tree optimizers have run such cleanups may + be necessary. */ + +static unsigned int +execute_cleanup_cfg_pre_ipa (void) +{ + cleanup_tree_cfg (); + return 0; +} + +struct gimple_opt_pass pass_cleanup_cfg = +{ + { + GIMPLE_PASS, + "cleanup_cfg", /* name */ + NULL, /* gate */ + execute_cleanup_cfg_pre_ipa, /* execute */ + NULL, /* sub */ + NULL, /* next */ + 0, /* static_pass_number */ + TV_NONE, /* tv_id */ + PROP_cfg, /* properties_required */ + 0, /* properties_provided */ + 0, /* properties_destroyed */ + 0, /* todo_flags_start */ + TODO_dump_func /* todo_flags_finish */ + } }; + /* Pass: cleanup the CFG just before expanding trees to RTL. This is just a round of label cleanups and case node grouping because after the tree optimizers have run such cleanups may be necessary. */ -static void +static unsigned int execute_cleanup_cfg_post_optimizing (void) { + fold_cond_expr_cond (); cleanup_tree_cfg (); cleanup_dead_labels (); group_case_labels (); + return 0; } -static struct tree_opt_pass pass_cleanup_cfg_post_optimizing = +struct gimple_opt_pass pass_cleanup_cfg_post_optimizing = { - "final_cleanup", /* name */ + { + GIMPLE_PASS, + "optimized", /* name */ NULL, /* gate */ execute_cleanup_cfg_post_optimizing, /* execute */ NULL, /* sub */ NULL, /* next */ 0, /* static_pass_number */ - 0, /* tv_id */ + TV_NONE, /* tv_id */ PROP_cfg, /* properties_required */ 0, /* properties_provided */ 0, /* properties_destroyed */ 0, /* todo_flags_start */ - TODO_dump_func, /* todo_flags_finish */ - 0 /* letter */ + TODO_dump_func /* todo_flags_finish */ + | TODO_remove_unused_locals + } }; /* Pass: do the actions required to finish with tree-ssa optimization passes. */ -static void +unsigned int execute_free_datastructures (void) { - tree *chain; - - /* ??? This isn't the right place for this. Worse, it got computed - more or less at random in various passes. */ free_dominance_info (CDI_DOMINATORS); + free_dominance_info (CDI_POST_DOMINATORS); - /* Emit gotos for implicit jumps. */ - disband_implicit_edges (); + /* And get rid of annotations we no longer need. */ + delete_tree_cfg_annotations (); - /* Remove the ssa structures. Do it here since this includes statement - annotations that need to be intact during disband_implicit_edges. */ - delete_tree_ssa (); + return 0; +} - /* Re-chain the statements from the blocks. */ - chain = &DECL_SAVED_TREE (current_function_decl); - *chain = alloc_stmt_list (); +/* Pass: fixup_cfg. IPA passes, compilation of earlier functions or inlining + might have changed some properties, such as marked functions nothrow. + Remove redundant edges and basic blocks, and create new ones if necessary. - /* And get rid of annotations we no longer need. */ - delete_tree_cfg_annotations (); + This pass can't be executed as stand alone pass from pass manager, because + in between inlining and this fixup the verify_flow_info would fail. */ + +unsigned int +execute_fixup_cfg (void) +{ + basic_block bb; + gimple_stmt_iterator gsi; + int todo = gimple_in_ssa_p (cfun) ? TODO_verify_ssa : 0; + + if (cfun->eh) + FOR_EACH_BB (bb) + { + for (gsi = gsi_start_bb (bb); !gsi_end_p (gsi); gsi_next (&gsi)) + { + gimple stmt = gsi_stmt (gsi); + tree decl = is_gimple_call (stmt) + ? gimple_call_fndecl (stmt) + : NULL; + + if (decl + && gimple_call_flags (stmt) & (ECF_CONST + | ECF_PURE + | ECF_LOOPING_CONST_OR_PURE)) + { + if (gimple_in_ssa_p (cfun)) + { + todo |= TODO_update_ssa | TODO_cleanup_cfg; + mark_symbols_for_renaming (stmt); + update_stmt (stmt); + } + } + + if (!stmt_could_throw_p (stmt) && lookup_stmt_eh_region (stmt)) + remove_stmt_from_eh_region (stmt); + } + + if (gimple_purge_dead_eh_edges (bb)) + todo |= TODO_cleanup_cfg; + } + + /* Dump a textual representation of the flowgraph. */ + if (dump_file) + gimple_dump_cfg (dump_file, dump_flags); + + return todo; } -static struct tree_opt_pass pass_free_datastructures = +struct gimple_opt_pass pass_fixup_cfg = { + { + GIMPLE_PASS, NULL, /* name */ NULL, /* gate */ - execute_free_datastructures, /* execute */ + execute_fixup_cfg, /* execute */ NULL, /* sub */ NULL, /* next */ 0, /* static_pass_number */ - 0, /* tv_id */ + TV_NONE, /* tv_id */ PROP_cfg, /* properties_required */ 0, /* properties_provided */ 0, /* properties_destroyed */ 0, /* todo_flags_start */ - 0, /* todo_flags_finish */ - 0 /* letter */ + 0 /* todo_flags_finish */ + } }; - /* Do the actions required to initialize internal data structures used in tree-ssa optimization passes. */ -static void +static unsigned int execute_init_datastructures (void) { /* Allocate hash tables, arrays and other structures. */ - init_tree_ssa (); + init_tree_ssa (cfun); + return 0; } -static struct tree_opt_pass pass_init_datastructures = +struct gimple_opt_pass pass_init_datastructures = { + { + GIMPLE_PASS, NULL, /* name */ NULL, /* gate */ execute_init_datastructures, /* execute */ NULL, /* sub */ NULL, /* next */ 0, /* static_pass_number */ - 0, /* tv_id */ + TV_NONE, /* tv_id */ PROP_cfg, /* properties_required */ 0, /* properties_provided */ 0, /* properties_destroyed */ 0, /* todo_flags_start */ - 0, /* todo_flags_finish */ - 0 /* letter */ + 0 /* todo_flags_finish */ + } }; -/* Iterate over the pass tree allocating dump file numbers. We want - to do this depth first, and independent of whether the pass is - enabled or not. */ - -static void -register_one_dump_file (struct tree_opt_pass *pass, int n) -{ - char *dot_name, *flag_name, *glob_name; - char num[10]; - - /* See below in next_pass_1. */ - num[0] = '\0'; - if (pass->static_pass_number != -1) - sprintf (num, "%d", ((int) pass->static_pass_number < 0 - ? 1 : pass->static_pass_number)); - - dot_name = concat (".", pass->name, num, NULL); - if (pass->properties_provided & PROP_trees) - { - flag_name = concat ("tree-", pass->name, num, NULL); - glob_name = concat ("tree-", pass->name, NULL); - pass->static_pass_number = dump_register (dot_name, flag_name, glob_name, - TDF_TREE, n + TDI_tree_all, 0); - } - else - { - flag_name = concat ("rtl-", pass->name, num, NULL); - glob_name = concat ("rtl-", pass->name, NULL); - pass->static_pass_number = dump_register (dot_name, flag_name, glob_name, - TDF_RTL, n, pass->letter); - } -} - -static int -register_dump_files (struct tree_opt_pass *pass, int properties) -{ - static int n = 0; - do - { - int new_properties; - int pass_number; - - pass->properties_required = properties; - new_properties = - (properties | pass->properties_provided) & ~pass->properties_destroyed; - - /* Reset the counter when we reach RTL-based passes. */ - if ((pass->properties_provided ^ pass->properties_required) & PROP_rtl) - n = 0; - - pass_number = n; - if (pass->name) - n++; - - if (pass->sub) - new_properties = register_dump_files (pass->sub, new_properties); - - /* If we have a gate, combine the properties that we could have with - and without the pass being examined. */ - if (pass->gate) - properties &= new_properties; - else - properties = new_properties; - - pass->properties_provided = properties; - if (pass->name) - register_one_dump_file (pass, pass_number); - - pass = pass->next; - } - while (pass); - - return properties; -} - -/* Add a pass to the pass list. Duplicate the pass if it's already - in the list. */ - -static struct tree_opt_pass ** -next_pass_1 (struct tree_opt_pass **list, struct tree_opt_pass *pass) -{ - - /* A nonzero static_pass_number indicates that the - pass is already in the list. */ - if (pass->static_pass_number) - { - struct tree_opt_pass *new; - - new = xmalloc (sizeof (*new)); - memcpy (new, pass, sizeof (*new)); - - /* Indicate to register_dump_files that this pass has duplicates, - and so it should rename the dump file. The first instance will - be -1, and be number of duplicates = -static_pass_number - 1. - Subsequent instances will be > 0 and just the duplicate number. */ - if (pass->name) - { - pass->static_pass_number -= 1; - new->static_pass_number = -pass->static_pass_number; - } - - *list = new; - } - else - { - pass->static_pass_number = -1; - *list = pass; - } - - return &(*list)->next; - -} - -/* Construct the pass tree. */ - void -init_tree_optimization_passes (void) -{ - struct tree_opt_pass **p; - -#define NEXT_PASS(PASS) (p = next_pass_1 (p, &PASS)) - - p = &all_passes; - NEXT_PASS (pass_gimple); - NEXT_PASS (pass_remove_useless_stmts); - NEXT_PASS (pass_mudflap_1); - NEXT_PASS (pass_lower_cf); - NEXT_PASS (pass_lower_eh); - NEXT_PASS (pass_build_cfg); - NEXT_PASS (pass_pre_expand); - NEXT_PASS (pass_tree_profile); - NEXT_PASS (pass_init_datastructures); - NEXT_PASS (pass_all_optimizations); - NEXT_PASS (pass_warn_function_return); - NEXT_PASS (pass_mudflap_2); - NEXT_PASS (pass_free_datastructures); - NEXT_PASS (pass_expand); - NEXT_PASS (pass_rest_of_compilation); - *p = NULL; - - p = &pass_all_optimizations.sub; - NEXT_PASS (pass_referenced_vars); - NEXT_PASS (pass_create_structure_vars); - NEXT_PASS (pass_build_ssa); - NEXT_PASS (pass_may_alias); - NEXT_PASS (pass_rename_ssa_copies); - NEXT_PASS (pass_early_warn_uninitialized); - NEXT_PASS (pass_dce); - NEXT_PASS (pass_dominator); - NEXT_PASS (pass_copy_prop); - NEXT_PASS (pass_dce); - NEXT_PASS (pass_vrp); - NEXT_PASS (pass_merge_phi); - NEXT_PASS (pass_forwprop); - NEXT_PASS (pass_phiopt); - NEXT_PASS (pass_may_alias); - NEXT_PASS (pass_tail_recursion); - NEXT_PASS (pass_ch); - NEXT_PASS (pass_profile); - NEXT_PASS (pass_stdarg); - NEXT_PASS (pass_sra); - /* FIXME: SRA may generate arbitrary gimple code, exposing new - aliased and call-clobbered variables. As mentioned below, - pass_may_alias should be a TODO item. */ - NEXT_PASS (pass_may_alias); - NEXT_PASS (pass_rename_ssa_copies); - NEXT_PASS (pass_dominator); - NEXT_PASS (pass_copy_prop); - NEXT_PASS (pass_dce); - NEXT_PASS (pass_dse); - NEXT_PASS (pass_may_alias); - NEXT_PASS (pass_forwprop); - NEXT_PASS (pass_phiopt); - NEXT_PASS (pass_store_ccp); - NEXT_PASS (pass_store_copy_prop); - NEXT_PASS (pass_fold_builtins); - /* FIXME: May alias should a TODO but for 4.0.0, - we add may_alias right after fold builtins - which can create arbitrary GIMPLE. */ - NEXT_PASS (pass_may_alias); - NEXT_PASS (pass_split_crit_edges); - NEXT_PASS (pass_pre); - NEXT_PASS (pass_sink_code); - NEXT_PASS (pass_loop); - NEXT_PASS (pass_dominator); - NEXT_PASS (pass_copy_prop); - /* FIXME: If DCE is not run before checking for uninitialized uses, - we may get false warnings (e.g., testsuite/gcc.dg/uninit-5.c). - However, this also causes us to misdiagnose cases that should be - real warnings (e.g., testsuite/gcc.dg/pr18501.c). - - To fix the false positives in uninit-5.c, we would have to - account for the predicates protecting the set and the use of each - variable. Using a representation like Gated Single Assignment - may help. */ - NEXT_PASS (pass_late_warn_uninitialized); - NEXT_PASS (pass_cd_dce); - NEXT_PASS (pass_dse); - NEXT_PASS (pass_forwprop); - NEXT_PASS (pass_phiopt); - NEXT_PASS (pass_tail_calls); - NEXT_PASS (pass_rename_ssa_copies); - NEXT_PASS (pass_del_ssa); - NEXT_PASS (pass_nrv); - NEXT_PASS (pass_remove_useless_vars); - NEXT_PASS (pass_mark_used_blocks); - NEXT_PASS (pass_cleanup_cfg_post_optimizing); - *p = NULL; - - p = &pass_loop.sub; - NEXT_PASS (pass_loop_init); - NEXT_PASS (pass_copy_prop); - NEXT_PASS (pass_lim); - NEXT_PASS (pass_unswitch); - NEXT_PASS (pass_record_bounds); - NEXT_PASS (pass_linear_transform); - NEXT_PASS (pass_iv_canon); - NEXT_PASS (pass_if_conversion); - NEXT_PASS (pass_vectorize); - NEXT_PASS (pass_complete_unroll); - NEXT_PASS (pass_iv_optimize); - NEXT_PASS (pass_loop_done); - *p = NULL; - -#undef NEXT_PASS - - /* Register the passes with the tree dump code. */ - register_dump_files (all_passes, 0); -} - -static void execute_pass_list (struct tree_opt_pass *); - -static unsigned int last_verified; - -static void -execute_todo (struct tree_opt_pass *pass, unsigned int flags, bool use_required) -{ - int properties - = use_required ? pass->properties_required : pass->properties_provided; - -#if defined ENABLE_CHECKING - if (need_ssa_update_p ()) - gcc_assert (flags & TODO_update_ssa_any); -#endif - - if (flags & TODO_update_ssa_any) - { - unsigned update_flags = flags & TODO_update_ssa_any; - update_ssa (update_flags); - } - - if (flags & TODO_cleanup_cfg) - { - if (current_loops) - cleanup_tree_cfg_loop (); - else - cleanup_tree_cfg (); - } - - if ((flags & TODO_dump_func) && dump_file) - { - if (properties & PROP_trees) - dump_function_to_file (current_function_decl, - dump_file, dump_flags); - else if (properties & PROP_cfg) - print_rtl_with_bb (dump_file, get_insns ()); - else - print_rtl (dump_file, get_insns ()); - - /* Flush the file. If verification fails, we won't be able to - close the file before aborting. */ - fflush (dump_file); - } - - if (flags & TODO_ggc_collect) - { - ggc_collect (); - } - -#if defined ENABLE_CHECKING - if ((pass->properties_required & PROP_ssa) - && !(pass->properties_destroyed & PROP_ssa)) - verify_ssa (true); - if (flags & TODO_verify_flow) - verify_flow_info (); - if (flags & TODO_verify_stmts) - verify_stmts (); - if (flags & TODO_verify_loops) - verify_loop_closed_ssa (); -#endif -} - -static bool -execute_one_pass (struct tree_opt_pass *pass) +tree_lowering_passes (tree fn) { - unsigned int todo; - - /* See if we're supposed to run this pass. */ - if (pass->gate && !pass->gate ()) - return false; - - /* Note that the folders should only create gimple expressions. - This is a hack until the new folder is ready. */ - in_gimple_form = (pass->properties_provided & PROP_trees) != 0; - - /* Run pre-pass verification. */ - todo = pass->todo_flags_start & ~last_verified; - if (todo) - execute_todo (pass, todo, true); - - /* If a dump file name is present, open it if enabled. */ - if (pass->static_pass_number != -1) - { - bool initializing_dump = !dump_initialized_p (pass->static_pass_number); - dump_file_name = get_dump_file_name (pass->static_pass_number); - dump_file = dump_begin (pass->static_pass_number, &dump_flags); - if (dump_file) - { - const char *dname, *aname; - dname = lang_hooks.decl_printable_name (current_function_decl, 2); - aname = (IDENTIFIER_POINTER - (DECL_ASSEMBLER_NAME (current_function_decl))); - fprintf (dump_file, "\n;; Function %s (%s)%s\n\n", dname, aname, - cfun->function_frequency == FUNCTION_FREQUENCY_HOT - ? " (hot)" - : cfun->function_frequency == FUNCTION_FREQUENCY_UNLIKELY_EXECUTED - ? " (unlikely executed)" - : ""); - } - - if (initializing_dump - && graph_dump_format != no_graph - && (pass->properties_provided & (PROP_cfg | PROP_rtl)) - == (PROP_cfg | PROP_rtl)) - clean_graph_dump_file (dump_file_name); - } - - /* If a timevar is present, start it. */ - if (pass->tv_id) - timevar_push (pass->tv_id); - - /* Do it! */ - if (pass->execute) - pass->execute (); - - /* Stop timevar. */ - if (pass->tv_id) - timevar_pop (pass->tv_id); - - if (dump_file - && (pass->properties_provided & (PROP_cfg | PROP_rtl)) - == (PROP_cfg | PROP_rtl)) - print_rtl_with_bb (dump_file, get_insns ()); - - /* Run post-pass cleanup and verification. */ - todo = pass->todo_flags_finish; - last_verified = todo & TODO_verify_all; - if (todo) - execute_todo (pass, todo, false); - - /* Flush and close dump file. */ - if (dump_file_name) - { - free ((char *) dump_file_name); - dump_file_name = NULL; - } - if (dump_file) - { - dump_end (pass->static_pass_number, dump_file); - dump_file = NULL; - } - - return true; -} + tree saved_current_function_decl = current_function_decl; -static void -execute_pass_list (struct tree_opt_pass *pass) -{ - do - { - if (execute_one_pass (pass) && pass->sub) - execute_pass_list (pass->sub); - pass = pass->next; - } - while (pass); -} - - -/* Update recursively all inlined_to pointers of functions - inlined into NODE to INLINED_TO. */ -static void -update_inlined_to_pointers (struct cgraph_node *node, - struct cgraph_node *inlined_to) -{ - struct cgraph_edge *e; - for (e = node->callees; e; e = e->next_callee) - { - if (e->callee->global.inlined_to) - { - e->callee->global.inlined_to = inlined_to; - update_inlined_to_pointers (e->callee, inlined_to); - } - } + current_function_decl = fn; + push_cfun (DECL_STRUCT_FUNCTION (fn)); + gimple_register_cfg_hooks (); + bitmap_obstack_initialize (NULL); + execute_pass_list (all_lowering_passes); + if (optimize && cgraph_global_info_ready) + execute_pass_list (pass_early_local_passes.pass.sub); + free_dominance_info (CDI_POST_DOMINATORS); + free_dominance_info (CDI_DOMINATORS); + compact_blocks (); + current_function_decl = saved_current_function_decl; + bitmap_obstack_release (NULL); + pop_cfun (); } - /* For functions-as-trees languages, this performs all optimization and compilation for FNDECL. */ @@ -618,11 +360,16 @@ void tree_rest_of_compilation (tree fndecl) { location_t saved_loc; - struct cgraph_node *saved_node = NULL, *node; + struct cgraph_node *node; timevar_push (TV_EXPAND); - gcc_assert (!flag_unit_at_a_time || cgraph_global_info_ready); + gcc_assert (cgraph_global_info_ready); + + node = cgraph_node (fndecl); + + /* Initialize the default bitmap obstack. */ + bitmap_obstack_initialize (NULL); /* Initialize the RTL code for the function. */ current_function_decl = fndecl; @@ -634,62 +381,11 @@ tree_rest_of_compilation (tree fndecl) call expand_expr to calculate the size of a variable-sized array. We haven't necessarily assigned RTL to all variables yet, so it's not safe to try to expand expressions involving them. */ - cfun->x_dont_save_pending_sizes_p = 1; - - node = cgraph_node (fndecl); - - /* We might need the body of this function so that we can expand - it inline somewhere else. This means not lowering some constructs - such as exception handling. */ - if (cgraph_preserve_function_body_p (fndecl)) - { - if (!flag_unit_at_a_time) - { - struct cgraph_edge *e; - - saved_node = cgraph_clone_node (node); - for (e = saved_node->callees; e; e = e->next_callee) - if (!e->inline_failed) - cgraph_clone_inlined_nodes (e, true); - } - cfun->saved_static_chain_decl = cfun->static_chain_decl; - cfun->saved_tree = save_body (fndecl, &cfun->saved_args, - &cfun->saved_static_chain_decl); - } - - if (flag_inline_trees) - { - struct cgraph_edge *e; - for (e = node->callees; e; e = e->next_callee) - if (!e->inline_failed || warn_inline) - break; - if (e) - { - timevar_push (TV_INTEGRATION); - optimize_inline_calls (fndecl); - timevar_pop (TV_INTEGRATION); - } - } - /* We are not going to maintain the cgraph edges up to date. - Kill it so it won't confuse us. */ - while (node->callees) - { - /* In non-unit-at-a-time we must mark all referenced functions as needed. - */ - if (node->callees->callee->analyzed && !flag_unit_at_a_time) - cgraph_mark_needed_node (node->callees->callee); - cgraph_remove_edge (node->callees); - } - - /* We are not going to maintain the cgraph edges up to date. - Kill it so it won't confuse us. */ - cgraph_node_remove_callees (node); - + cfun->dont_save_pending_sizes_p = 1; + + gimple_register_cfg_hooks (); - /* Initialize the default bitmap obstack. */ - bitmap_obstack_initialize (NULL); bitmap_obstack_initialize (®_obstack); /* FIXME, only at RTL generation*/ - /* Perform all tree transforms and optimizations. */ execute_pass_list (all_passes); @@ -698,32 +394,7 @@ tree_rest_of_compilation (tree fndecl) /* Release the default bitmap obstack. */ bitmap_obstack_release (NULL); - /* Restore original body if still needed. */ - if (cfun->saved_tree) - { - DECL_SAVED_TREE (fndecl) = cfun->saved_tree; - DECL_ARGUMENTS (fndecl) = cfun->saved_args; - cfun->static_chain_decl = cfun->saved_static_chain_decl; - - /* When not in unit-at-a-time mode, we must preserve out of line copy - representing node before inlining. Restore original outgoing edges - using clone we created earlier. */ - if (!flag_unit_at_a_time) - { - struct cgraph_edge *e; - - cgraph_node_remove_callees (node); - node->callees = saved_node->callees; - saved_node->callees = NULL; - update_inlined_to_pointers (node, node); - for (e = node->callees; e; e = e->next_callee) - e->caller = node; - cgraph_remove_node (saved_node); - } - } - else - DECL_SAVED_TREE (fndecl) = NULL; - cfun = 0; + set_cfun (NULL); /* If requested, warn about function definitions where the function will return a value (usually of some struct or union type) which itself will @@ -741,28 +412,25 @@ tree_rest_of_compilation (tree fndecl) = TREE_INT_CST_LOW (TYPE_SIZE_UNIT (ret_type)); if (compare_tree_int (TYPE_SIZE_UNIT (ret_type), size_as_int) == 0) - warning ("%Jsize of return value of %qD is %u bytes", - fndecl, fndecl, size_as_int); + warning (OPT_Wlarger_than_eq, "size of return value of %q+D is %u bytes", + fndecl, size_as_int); else - warning ("%Jsize of return value of %qD is larger than %wd bytes", - fndecl, fndecl, larger_than_size); + warning (OPT_Wlarger_than_eq, "size of return value of %q+D is larger than %wd bytes", + fndecl, larger_than_size); } } - if (!flag_inline_trees) + gimple_set_body (fndecl, NULL); + if (DECL_STRUCT_FUNCTION (fndecl) == 0 + && !cgraph_node (fndecl)->origin) { - DECL_SAVED_TREE (fndecl) = NULL; - if (DECL_STRUCT_FUNCTION (fndecl) == 0 - && !cgraph_node (fndecl)->origin) - { - /* Stop pointing to the local nodes about to be freed. - But DECL_INITIAL must remain nonzero so we know this - was an actual function definition. - For a nested function, this is done in c_pop_function_context. - If rest_of_compilation set this to 0, leave it 0. */ - if (DECL_INITIAL (fndecl) != 0) - DECL_INITIAL (fndecl) = error_mark_node; - } + /* Stop pointing to the local nodes about to be freed. + But DECL_INITIAL must remain nonzero so we know this + was an actual function definition. + For a nested function, this is done in c_pop_function_context. + If rest_of_compilation set this to 0, leave it 0. */ + if (DECL_INITIAL (fndecl) != 0) + DECL_INITIAL (fndecl) = error_mark_node; } input_location = saved_loc;